我有一台旧的 2011 年东芝 Qosmio X770 笔记本电脑，上面安装了 CentOS Stream 8 和 Windows 7。背光键盘在 Windows 下工作正常，但在 Linux 下却保持暗色。
如何在 Linux 上打开键盘背光？
CapsLock 和 NumLock LED 均工作正常。 Fn+Z 键（控制键盘背光）不执行任何操作。
命令xset led on或xset led off似乎没有任何效果。
输出find /sys/devices -iname '*keyboard*' -or -iname '*kbd*' -or -iname '*backlight*'：
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-eDP-1/nv_backlight1
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-LVDS-2/nv_backlight
/sys/devices/pci0000:00/0000:00:02.0/backlight
/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-LVDS-1/intel_backlight
内容/sys/class/leds/：
lrwxrwxrwx 1 root root 0 Sep 1 21:39 ath9k-phy0 -> ../../devices/pci0000:00/0000:00:1c.1/0000:03:00.0/leds/ath9k-phy0
lrwxrwxrwx 1 root root 0 Sep 1 2022 input3::capslock -> ../../devices/platform/i8042/serio0/input/input3/input3::capslock
lrwxrwxrwx 1 root root 0 Sep 1 2022 input3::numlock -> ../../devices/platform/i8042/serio0/input/input3/input3::numlock
lrwxrwxrwx 1 root root 0 Sep 1 2022 input3::scrolllock -> ../../devices/platform/i8042/serio0/input/input3/input3::scrolllock
lrwxrwxrwx 1 root root 0 Sep 1 21:39 mmc0:: -> ../../devices/pci0000:00/0000:00:1c.3/0000:05:00.0/leds/mmc0::
编辑：输出lsmod | grep acpi：
snd_intel_sdw_acpi 16384 1 snd_intel_dspcfg